On September 13, JSC “CDBMB" (a part of Machine Building Division of Rosatom – “Atomenergomash”) has delivered six glandless electric pumps of vertical design to Tianwan Nuclear Power Plant. Two more pumps were shipped to China last month.

Glandless electric pump is an auxiliary pump related to the reactor coolant pump set (RCPS). The electric pump is installed in the cooling circuit of the RCPS radial-axial bearing to ensure the circulation of the coolant and the reliable operation of the bearing. A spare set of eight glandless electric pumps was manufactured for eight RCPS-1391 operating at the third and fourth power units of the Tianwan NPP. RCPS-1391 for these two units were manufactured at CDBMB in 2015.

Currently, CDBMB is working on design documentation for RCPS-1391 pumps, which will be equipped with the seventh and eighth operating units under construction.


Central Design Bureau of Machine Building was established in 1945. The company has been developing, producing and testing high-technology equipment for nuclear industry: reactor coolant pumps, canned and console pumps, feeding and emergency pumps, and a wide range of remotely-operated equipment for radioactive material handling. CDBMB is the only designer and manufacturer of reactor coolant pump sets for water-cooled power reactors (VVER-type) in Russia.